Composition of matter for use in removing grease, &amp;c., from molds used in the art of electrotyping.



W '4 m a J UNITED STATES PATENT OFFICE.

GEORGE E. DUNTON, OF NEW YORK, N. Y.

COMPOSITION OF MATTER FOR USE IN REMOVING GREASE, 850., FROM MOLDS USEDIN THE ART OF ELECTROTYPIN G.

No Drawing.

To all whom it may concern:

.Be it known that I, GEORGE E. DUNTON, residing at New York, county ofNew York, State of New York, a citizen of the United States, haveinvented certain new and useful Imprmements in Composition of Matter forUse in Removing Grease, &c., from the Molds Used in the Art ofElectrotyping; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it pertains to make and use the same.

The material for forming molds used in the electrotyping art for theproduction of printing plates is commonly made of some substance such asbeeswax, ozokerite wax or like material which contains an appreciablepercentage of grease, oil or oily substance in their composition.

\Vhen pressure is applied to a form or cut in making the impression inthe mold, it causes the grease or oily substance to be forced.out andappear on the face of the mold in the form of a thin coating or film,said coating or film is very troublesome and annoying to theelectrotyper as it causes imperfect and faulty reproductions, especiallyin case where the so-called half tone illustrations are being made whichare composed or made up of a collection of very fine dots.

My invention relates to a new and useful composition for curing theabove fault which is especially adapted for use in dissolving,disintegrating and removing grease, oil or other fatty substances fromthe pressed surfaces of Wax molds used in the art of electrotypingpreparatory to applying a black lead or other coating to the mold.

The composition consists of the following ingredients Methyl alcoholSquarts. Chlorin water 3pints. Sodium chlorid dissolved in water tosaturation lquart. Hydrochloric acid about 20 degrees Baum i pint. ater1 quart.

In compounding the composition, I first provide a suitable receptacleand pour into the same 8 quarts of methyl alcohol and to this alcoholadd 3 pints of chlorin water, which is free chlorin gas dissolved inwater Specification of Letters Patent.

Application filed July 22, 1910. Serial No. 573,294.

Patented June 25, 1912.

to saturation, next put one quart of water into a mixing receptacle andadd to it while constantly stirring 6 ounces of sodium chlorid and afterthe water has taken up or dissolved all that it can pour the whole ofthe salt solution into the alcohol and chlorin water solution, stirringbriskly for a few moments, and then finally add, still stirring, of apint of hydrochloric acid and keep up the stirring until no bubblesappear or come to the surface.

This composition is to be placed in a lead lined trough or receptacle ofsufiicient size to take the largest size mold, when it is ready for use,but it should be stirred occasionally to keep the chlorin element fromsinking or gravitating to the bottom and forming a strata at the lowerlevel of the composition.

The composition may be poured over the surface of the wax mold or themold may be immersed or dipped into the composition as is desired.

The above composition acts to break up and dissolve the constituentparts of the grease, oil or other substance appearing on the surface ofthe mold and destroys the cohesion between the several elementscomposing the grease, oil or other substance so as to permit of its easyremoval from the surface of the mold.

The action depends upon the aiiinities of nascent chlorin for hydrogenand the attraction of oxygen 'for sodium, and the presence of a fluxwhich assists these actions on the elements composing the grease.

I do not wish to confine myself to the exact proportion of eachingredient as stated, as they may be varied, or to the use of sodium asany of the chlorinated salts, such for instance as potassium, calcium,barium or other inorganic salt may be used, also other combinations maybe made to produce the same results, and still come Within the scope andspirit of my invention.

What I claim is 1. A composition the constituent ingredients of whichare methyl alcohol, sodium chlorid, chlorin and hydrochloric acid,substantially as described.

2. A composition the constituent ingredients of which are methylalcohol, a saturated solution of sodium chlorid dissolved in water, freechlorin gas dissolved in Water and hydrochloric acid, substantially asde- I In testimony whereof,I aflix my signature scribelil. in thepresence of two Witnesses.

3. composition the constituent ingre- '"-'f dients of which are methylalcohol 8 quarts, GEORGE DUNTON' 5 chlorin Water 3 pints, saturatedsolution of "Witnesses:

sodium chlorid 1 quart and 2; of a pint of FRANCIS S. DUFF, hydrochloricacid, substantially as described. H. BECKER.

copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patent!- Washington, D. G.

Hutchinson, 542,524, July 9, 1895 (87-5, Stone),

Despain, 4045587, June 4, 1889 (87-5, Wood),

Dane, 862,942, May 17, 1887 (87-5, Wall).

